Effect of Surface Roughness on Matching Properties between Ceramic Framework and Coating-Glass for Dental Applications

Abstract:

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This study was conducted to evaluate the influence of surface roughness on anchoring strength
between ceramic and coating glass. Commercial Vita alpha glass-ceramic was selected as the coating
glass, while the zirconia/alumina (Z/A) composite as the substrate. Anchoring strength between substrate
and coating-glass was tested, and microstructure of the junction was also observed. From the experiments
we can find the following results. There was significant difference in the mean strength of different
surface roughness groups and HF acid-etching also had a favorable effect on matching properties. The
highest amount of anchoring strength was occurred at the high scope of roughness after HF acid-etching
and surface roughness will also affect the microstructure of the junction. Therefore, we can draw the
conclusions that with the limit of this research, roughness will influence matching properties between
ceramic substrate and coating-glass, while hydrofluoric acid etching was also suggested in the matching
procedure. Testing matching properties between ceramic substrate and coating-glass should consider the
influence of surface roughness.

Abstract: Through the test and theoretical analysis of post-anchoring drawing method for inorganic materials, the paper discusses the influence factors of implanted reinforcement drawing technology for inorganic materials of the concrete structures and analyzes the influence of concrete strength, anchoring depth of implanted reinforcement, shape of reinforcement and diameters on the inorganic material reinforcement implanting technology, providing theoretical basis for the preparation of Technical specification for post-anchoring used in concrete with inorganic anchoring material.

Abstract: Prestressing spiral groove tendon is a new sort prestressing tendon, its characteristic value of tensile yield strength fyk=1000MPa. Firstly, the yield strength, ultimate tensile strength, elastic modulus and elongation are all tested. According to 68 pullout tests, the bond-anchoring curves and failure modes have been studied, and the effects of concrete strength, diameter, anchoring length, thickness of concrete cover and stirrup ratio have been all analyzed. Finally, the equation for ultimate bond-anchoring strength has been suggested by statistical regression, and the test results are in good agreement with values of the suggested equation.